@fl42v I have thousands from my early days, but my only recent-ish one was pretty funny.
On an Arch install that hadn't been updated for a while, in a rush, had an app that needed OpenSSL 3. Instead of updating the whole system, I just updated the openssl package.
Everything broke immediately. Turns out a lot of stuff depends on openssl. Who knew?
To fix, booted to the arch installer, chrooted into my env, and reverted to the previous version of the package — then updated properly.
@squidspinachfootball@marcos Syncthing syncs. It does one way syncs, but if your workflow is complex and depends on one way syncs that's probably not what you want.
Sync things between operational systems, then replicate to nonoperational systems, and backup to off site segregated systems.